1장. 이산확률분포

• 이산확률분포

P<-c(0.301,0.176,0.125,0.097,0.079,0.067,0.058,0.051,0.046)
V<-(1:9)
이산확률분포
sum(V*P)

이산확률분포 분산
Dev<-(V-mean(V))^2
Dev

[1] 16  9  4  1  0  1  4  9 16
sum(Dev*P)
[1] 8.491
표준편차
stdev <- sqrt(sum(Dev*P))
stdev

[1] 2.913932